1 files changed, 373 insertions, 0 deletions

diff --git a/sound/soc/intel/atom/sst/sst_ipc.c b/sound/soc/intel/atom/sst/sst_ipc.c
new file mode 100644
index 000000000000..5a278618466c
--- /dev/null
+++ b/sound/soc/intel/atom/sst/sst_ipc.c
@@ -0,0 +1,373 @@
+/*
+ *  sst_ipc.c - Intel SST Driver for audio engine
+ *
+ *  Copyright (C) 2008-14 Intel Corporation
+ *  Authors:    Vinod Koul <vinod.koul@intel.com>
+ *              Harsha Priya <priya.harsha@intel.com>
+ *              Dharageswari R <dharageswari.r@intel.com>
+ *              KP Jeeja <jeeja.kp@intel.com>
+ *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  General Public License for more details.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+#include <linux/pci.h>
+#include <linux/firmware.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/pm_runtime.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/compress_driver.h>
+#include <asm/intel-mid.h>
+#include <asm/platform_sst_audio.h>
+#include "../sst-mfld-platform.h"
+#include "sst.h"
+#include "../../common/sst-dsp.h"
+
+struct sst_block *sst_create_block(struct intel_sst_drv *ctx,
+                                        u32 msg_id, u32 drv_id)
+{
+        struct sst_block *msg = NULL;
+
+        dev_dbg(ctx->dev, "Enter\n");
+        msg = kzalloc(sizeof(*msg), GFP_KERNEL);
+        if (!msg)
+                return NULL;
+        msg->condition = false;
+        msg->on = true;
+        msg->msg_id = msg_id;
+        msg->drv_id = drv_id;
+        spin_lock_bh(&ctx->block_lock);
+        list_add_tail(&msg->node, &ctx->block_list);
+        spin_unlock_bh(&ctx->block_lock);
+
+        return msg;
+}
+
+/*
+ * while handling the interrupts, we need to check for message status and
+ * then if we are blocking for a message
+ *
+ * here we are unblocking the blocked ones, this is based on id we have
+ * passed and search that for block threads.
+ * We will not find block in two cases
+ *  a) when its small message and block in not there, so silently ignore
+ *  them
+ *  b) when we are actually not able to find the block (bug perhaps)
+ *
+ *  Since we have bit of small messages we can spam kernel log with err
+ *  print on above so need to keep as debug prints which should be enabled
+ *  via dynamic debug while debugging IPC issues
+ */
+int sst_wake_up_block(struct intel_sst_drv *ctx, int result,
+                u32 drv_id, u32 ipc, void *data, u32 size)
+{
+        struct sst_block *block = NULL;
+
+        dev_dbg(ctx->dev, "Enter\n");
+
+        spin_lock_bh(&ctx->block_lock);
+        list_for_each_entry(block, &ctx->block_list, node) {
+                dev_dbg(ctx->dev, "Block ipc %d, drv_id %d\n", block->msg_id,
+                                                        block->drv_id);
+                if (block->msg_id == ipc && block->drv_id == drv_id) {
+                        dev_dbg(ctx->dev, "free up the block\n");
+                        block->ret_code = result;
+                        block->data = data;
+                        block->size = size;
+                        block->condition = true;
+                        spin_unlock_bh(&ctx->block_lock);
+                        wake_up(&ctx->wait_queue);
+                        return 0;
+                }
+        }
+        spin_unlock_bh(&ctx->block_lock);
+        dev_dbg(ctx->dev,
+                "Block not found or a response received for a short msg for ipc %d, drv_id %d\n",
+                ipc, drv_id);
+        return -EINVAL;
+}
+
+int sst_free_block(struct intel_sst_drv *ctx, struct sst_block *freed)
+{
+        struct sst_block *block = NULL, *__block;
+
+        dev_dbg(ctx->dev, "Enter\n");
+        spin_lock_bh(&ctx->block_lock);
+        list_for_each_entry_safe(block, __block, &ctx->block_list, node) {
+                if (block == freed) {
+                        pr_debug("pvt_id freed --> %d\n", freed->drv_id);
+                        /* toggle the index position of pvt_id */
+                        list_del(&freed->node);
+                        spin_unlock_bh(&ctx->block_lock);
+                        kfree(freed->data);
+                        freed->data = NULL;
+                        kfree(freed);
+                        return 0;
+                }
+        }
+        spin_unlock_bh(&ctx->block_lock);
+        dev_err(ctx->dev, "block is already freed!!!\n");
+        return -EINVAL;
+}
+
+int sst_post_message_mrfld(struct intel_sst_drv *sst_drv_ctx,
+                struct ipc_post *ipc_msg, bool sync)
+{
+        struct ipc_post *msg = ipc_msg;
+        union ipc_header_mrfld header;
+        unsigned int loop_count = 0;
+        int retval = 0;
+        unsigned long irq_flags;
+
+        dev_dbg(sst_drv_ctx->dev, "Enter: sync: %d\n", sync);
+        spin_lock_irqsave(&sst_drv_ctx->ipc_spin_lock, irq_flags);
+        header.full = sst_shim_read64(sst_drv_ctx->shim, SST_IPCX);
+        if (sync) {
+                while (header.p.header_high.part.busy) {
+                        if (loop_count > 25) {
+                                dev_err(sst_drv_ctx->dev,
+                                        "sst: Busy wait failed, cant send this msg\n");
+                                retval = -EBUSY;
+                                goto out;
+                        }
+                        cpu_relax();
+                        loop_count++;
+                        header.full = sst_shim_read64(sst_drv_ctx->shim, SST_IPCX);
+                }
+        } else {
+                if (list_empty(&sst_drv_ctx->ipc_dispatch_list)) {
+                        /* queue is empty, nothing to send */
+                        spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
+                        dev_dbg(sst_drv_ctx->dev,
+                                        "Empty msg queue... NO Action\n");
+                        return 0;
+                }
+
+                if (header.p.header_high.part.busy) {
+                        spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
+                        dev_dbg(sst_drv_ctx->dev, "Busy not free... post later\n");
+                        return 0;
+                }
+
+                /* copy msg from list */
+                msg = list_entry(sst_drv_ctx->ipc_dispatch_list.next,
+                                struct ipc_post, node);
+                list_del(&msg->node);
+        }
+        dev_dbg(sst_drv_ctx->dev, "sst: Post message: header = %x\n",
+                                msg->mrfld_header.p.header_high.full);
+        dev_dbg(sst_drv_ctx->dev, "sst: size = 0x%x\n",
+                        msg->mrfld_header.p.header_low_payload);
+
+        if (msg->mrfld_header.p.header_high.part.large)
+                memcpy_toio(sst_drv_ctx->mailbox + SST_MAILBOX_SEND,
+                        msg->mailbox_data,
+                        msg->mrfld_header.p.header_low_payload);
+
+        sst_shim_write64(sst_drv_ctx->shim, SST_IPCX, msg->mrfld_header.full);
+
+out:
+        spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
+        kfree(msg->mailbox_data);
+        kfree(msg);
+        return retval;
+}
+
+void intel_sst_clear_intr_mrfld(struct intel_sst_drv *sst_drv_ctx)
+{
+        union interrupt_reg_mrfld isr;
+        union interrupt_reg_mrfld imr;
+        union ipc_header_mrfld clear_ipc;
+        unsigned long irq_flags;
+
+        spin_lock_irqsave(&sst_drv_ctx->ipc_spin_lock, irq_flags);
+        imr.full = sst_shim_read64(sst_drv_ctx->shim, SST_IMRX);
+        isr.full = sst_shim_read64(sst_drv_ctx->shim, SST_ISRX);
+
+        /* write 1 to clear*/
+        isr.part.busy_interrupt = 1;
+        sst_shim_write64(sst_drv_ctx->shim, SST_ISRX, isr.full);
+
+        /* Set IA done bit */
+        clear_ipc.full = sst_shim_read64(sst_drv_ctx->shim, SST_IPCD);
+
+        clear_ipc.p.header_high.part.busy = 0;
+        clear_ipc.p.header_high.part.done = 1;
+        clear_ipc.p.header_low_payload = IPC_ACK_SUCCESS;
+        sst_shim_write64(sst_drv_ctx->shim, SST_IPCD, clear_ipc.full);
+        /* un mask busy interrupt */
+        imr.part.busy_interrupt = 0;
+        sst_shim_write64(sst_drv_ctx->shim, SST_IMRX, imr.full);
+        spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
+}
+
+
+/*
+ * process_fw_init - process the FW init msg
+ *
+ * @msg: IPC message mailbox data from FW
+ *
+ * This function processes the FW init msg from FW
+ * marks FW state and prints debug info of loaded FW
+ */
+static void process_fw_init(struct intel_sst_drv *sst_drv_ctx,
+                        void *msg)
+{
+        struct ipc_header_fw_init *init =
+                (struct ipc_header_fw_init *)msg;
+        int retval = 0;
+
+        dev_dbg(sst_drv_ctx->dev, "*** FW Init msg came***\n");
+        if (init->result) {
+                sst_set_fw_state_locked(sst_drv_ctx, SST_RESET);
+                dev_err(sst_drv_ctx->dev, "FW Init failed, Error %x\n",
+                                init->result);
+                retval = init->result;
+                goto ret;
+        }
+
+ret:
+        sst_wake_up_block(sst_drv_ctx, retval, FW_DWNL_ID, 0 , NULL, 0);
+}
+
+static void process_fw_async_msg(struct intel_sst_drv *sst_drv_ctx,
+                        struct ipc_post *msg)
+{
+        u32 msg_id;
+        int str_id;
+        u32 data_size, i;
+        void *data_offset;
+        struct stream_info *stream;
+        union ipc_header_high msg_high;
+        u32 msg_low, pipe_id;
+
+        msg_high = msg->mrfld_header.p.header_high;
+        msg_low = msg->mrfld_header.p.header_low_payload;
+        msg_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->cmd_id;
+        data_offset = (msg->mailbox_data + sizeof(struct ipc_dsp_hdr));
+        data_size =  msg_low - (sizeof(struct ipc_dsp_hdr));
+
+        switch (msg_id) {
+        case IPC_SST_PERIOD_ELAPSED_MRFLD:
+                pipe_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->pipe_id;
+                str_id = get_stream_id_mrfld(sst_drv_ctx, pipe_id);
+                if (str_id > 0) {
+                        dev_dbg(sst_drv_ctx->dev,
+                                "Period elapsed rcvd for pipe id 0x%x\n",
+                                pipe_id);
+                        stream = &sst_drv_ctx->streams[str_id];
+                        if (stream->period_elapsed)
+                                stream->period_elapsed(stream->pcm_substream);
+                        if (stream->compr_cb)
+                                stream->compr_cb(stream->compr_cb_param);
+                }
+                break;
+
+        case IPC_IA_DRAIN_STREAM_MRFLD:
+                pipe_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->pipe_id;
+                str_id = get_stream_id_mrfld(sst_drv_ctx, pipe_id);
+                if (str_id > 0) {
+                        stream = &sst_drv_ctx->streams[str_id];
+                        if (stream->drain_notify)
+                                stream->drain_notify(stream->drain_cb_param);
+                }
+                break;
+
+        case IPC_IA_FW_ASYNC_ERR_MRFLD:
+                dev_err(sst_drv_ctx->dev, "FW sent async error msg:\n");
+                for (i = 0; i < (data_size/4); i++)
+                        print_hex_dump(KERN_DEBUG, NULL, DUMP_PREFIX_NONE,
+                                        16, 4, data_offset, data_size, false);
+                break;
+
+        case IPC_IA_FW_INIT_CMPLT_MRFLD:
+                process_fw_init(sst_drv_ctx, data_offset);
+                break;
+
+        case IPC_IA_BUF_UNDER_RUN_MRFLD:
+                pipe_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->pipe_id;
+                str_id = get_stream_id_mrfld(sst_drv_ctx, pipe_id);
+                if (str_id > 0)
+                        dev_err(sst_drv_ctx->dev,
+                                "Buffer under-run for pipe:%#x str_id:%d\n",
+                                pipe_id, str_id);
+                break;
+
+        default:
+                dev_err(sst_drv_ctx->dev,
+                        "Unrecognized async msg from FW msg_id %#x\n", msg_id);
+        }
+}
+
+void sst_process_reply_mrfld(struct intel_sst_drv *sst_drv_ctx,
+                struct ipc_post *msg)
+{
+        unsigned int drv_id;
+        void *data;
+        union ipc_header_high msg_high;
+        u32 msg_low;
+        struct ipc_dsp_hdr *dsp_hdr;
+        unsigned int cmd_id;
+
+        msg_high = msg->mrfld_header.p.header_high;
+        msg_low = msg->mrfld_header.p.header_low_payload;
+
+        dev_dbg(sst_drv_ctx->dev, "IPC process message header %x payload %x\n",
+                        msg->mrfld_header.p.header_high.full,
+                        msg->mrfld_header.p.header_low_payload);
+
+        drv_id = msg_high.part.drv_id;
+
+        /* Check for async messages first */
+        if (drv_id == SST_ASYNC_DRV_ID) {
+                /*FW sent async large message*/
+                process_fw_async_msg(sst_drv_ctx, msg);
+                return;
+        }
+
+        /* FW sent short error response for an IPC */
+        if (msg_high.part.result && drv_id && !msg_high.part.large) {
+                /* 32-bit FW error code in msg_low */
+                dev_err(sst_drv_ctx->dev, "FW sent error response 0x%x", msg_low);
+                sst_wake_up_block(sst_drv_ctx, msg_high.part.result,
+                        msg_high.part.drv_id,
+                        msg_high.part.msg_id, NULL, 0);
+                return;
+        }
+
+        /*
+         * Process all valid responses
+         * if it is a large message, the payload contains the size to
+         * copy from mailbox
+         **/
+        if (msg_high.part.large) {
+                data = kzalloc(msg_low, GFP_KERNEL);
+                if (!data)
+                        return;
+                memcpy(data, (void *) msg->mailbox_data, msg_low);
+                /* Copy command id so that we can use to put sst to reset */
+                dsp_hdr = (struct ipc_dsp_hdr *)data;
+                cmd_id = dsp_hdr->cmd_id;
+                dev_dbg(sst_drv_ctx->dev, "cmd_id %d\n", dsp_hdr->cmd_id);
+                if (sst_wake_up_block(sst_drv_ctx, msg_high.part.result,
+                                msg_high.part.drv_id,
+                                msg_high.part.msg_id, data, msg_low))
+                        kfree(data);
+        } else {
+                sst_wake_up_block(sst_drv_ctx, msg_high.part.result,
+                                msg_high.part.drv_id,
+                                msg_high.part.msg_id, NULL, 0);
+        }
+
+}